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Finding the Fourth Proportional to 1,909.82, 2,862.01 and 1,129.98

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Solution

The fourth proportional to 1,909.82, 2,862.01 and 1,129.98 is: 1,693.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909.82 : 2,862.01 = 1,129.98 : x
  2. Step 2: Convert to fraction form
    1,909.82/2,862.01 = 1,129.98/x
  3. Step 3: Cross multiply
    1,909.82x = 2,862.01 × 1,129.98
  4. Step 4: Simplify right side
    1,909.82x = 3,234,014.06
  5. Step 5: Solve for x
    x = 3,234,014.06/1,909.82
  6. Step 6: Final answer
    x = 1,693.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.